Device for applying adhesive



May 7, 1929. HOLMAN 1,711,732

- DEVICE FOR APPLYING ADHESIVE Filed Sept. 15,1.1925 2 Sheets-Sheet 1 y 1929. A; HOLMAN 1,711,732

DEVICE FOR APPLYING ADHESIVE Filed Sept. 15, 1925 2 Sheets-Sheet 2 Patented May 7, 1929.

UNITED STATES LESLIE A. I IOLMAN, OF 'WALTHAM, MASSACHUSETTS.

DEVICE FOR APPLYING ADHESIVE.

Application filed September 15, 1925. Serial No. 56,481.

This invention relates to a device for applying adhesive to the surfaces of moving objects and while primarily designed'for use in connection with heel building machines of the type shown and described in U. S. Letters Patent, No. 1,547,891 issued to me March 2, 1926, it is capable of use in other types of heel building machines and in machines'in w iich the surfaces to be coated with adhesive are curved or are presented to the device at an angle..

In the adhesive applyingdevice disclosed in my said application, the applying elementor dauber was fined in relation to the heel lifts to be coated and therefore it was impracticable to use in said machine lifts which were curved or wedge-shaped since only a portion of the lift engaged the dauber. The use of curved or wedge-shaped lifts in heel making machines is of special advantage because they can be made from waste material which heretofore could be utilized for heel making only by hand work. Furthermore, it is desirable that the adhesive be spread over the applying end of the dauber in a thin film in order that it may be applied evenly to the surface of thelift and to avoid undue accumulation thereon.

The main object of the invention is, therefore, the provision of a device for applying adhesive for use in heel building and similar machines in which the adhesive applying element is loosely mounted and capable of a tipping movement in various directions to permit it to follow and engage oblique or curved surfaces in the article to which the adhesive is to be applied. I I Anotherobject of theinvent-ion is the provision of means for insuring a uniform and constant flow of the adhesive over the entire edge of the applying element in engagement with the surface to be coated. A. further object of the invention is the provision of an adhesive applying element so constructed and mounted that it may at the will of the operator and without interfering with the operation of the machine or appreciable effort be retracted to'an inoperative position.

Other objects of the invention will be more,

specifically set forth and described hereinafter. I

One of the important features ofmy 111- vention resides in the provision of a dauber element so mounted that it is capable of a limited movement in various directions sufiicient to permit it to follow curved or oblique surfaces in the application of the adhesive. Preferably, the dauber element is loosely mounted for a tilting or tipping movement so that when it is engaged by a heel lift or other object having a curved or oblique sur face the dauber element tilts to engage the largest possible surface on the object. This feature is of special valuein a heel building machine because it permits the use of irregularly shaped lifts.

Another important feature consists in pro viding means in the device for accumulating and holding a surplus supply of adhesive and for delivering it over the entire operative edge ofthe dauber element in a flow of uniform and even depth. This permits the amount of adhesive applied to be regulated to suit the particular use and keeps the machine clean and free from adhesive which would otherwisetend to drip from the lifts onto other parts of the machine.

In the drawings illustrating one embodiment of my invention, Figure 1 is a side elevation of a device constructed in accordance with my invention and a portion of a rotary member of the character shown in my said application for transferring heel lifts from a magazine to a conveyor, the dauber ele-,

ment of said device being shown in operative position in engagement with a heel lift; Fig. 2 is a similar view showing the dauber element thrown out of operative position be I tween lifts; Fig. 3 is a view similar to Fig.

2 but showing the dauber element retracted and out of use; Fig. 4 is a plan View .on an enlarged scale of the dauberv element and support; Fig. 5 is a central longitudinal sectional view on a largerscale on line 5-5 in Fig. 4; Fig. 6 is a cross-sectional view on line 6-6 in Fig. 4; and Fig. 7 is a perspective view from below of the cover element or plate for retaining and spreading the adhesive on the dauber element.

Referring to the drawings showing the preferred form of my invention, 10 designates an adhesive or glue applying'member or dauber in the form of an elongated plate having its lowerend 12 bent downwardly, the angle 14 formed thereby constituting the glueapplying edge for spreading the glue flow ng down over the dauber onto the surface to be coated. The dauber 10 may be loosely mounted on and carried by a plate support which in turn is fastened to the squared portion 16 of a rock-shaft 17 by a screw 18. The support 15 may be provided with a thickened portion 19 on its under face to form a shoulder to fit said squared portion 16 and to prevent any lateral swinging movement of the support on the screw 18. On each side the support may have an upright ear or saddle 20 having a recess 21 adapted to receive and support one end of a rod 22 secured transversely to the under face of the dauber 10 and adjacent its forward end and centrally disposed a boss 23 is threaded into the support. Normally the dauber is loosely mounted on the support with its rear end held thereabove by the rod 22 resting in the recesses of the saddles and its forward end on the boss 23. In this position the dauber is free to tilt downwardly or laterally in either direction on the boss as a pivot when pressure is applied along the angle edge 14- by the heel. lift to which glue is being applied. As a consequence, when a wedge-shaped lift for example engages the angle edge 14 the dauber is tilted to engage its entire surface, the direction. in which the dauber is tilted or tipped being dependent, of course, upon the position in which the lift is presented thereto.

For the purpose of insuring an even and constant flow of the adhesive over the entire operative end of the dauber means may be provided for retaining a surplus supply of the adhesive on the dauber and for releasing an amount necessary to secure a uniform flow and one such means is shown consisting of a cover 25 having its forward edge 26 and portions 27 of its rear edge in .he form of bent downwardly and adapted to engage the dauber when the cover is secured thereto by means of a screw 28. The body-pmtion, designated as 25 of the cover may have a keyhole opening 30 to permit the cover to be placed in position and removed at will without manipulation of the screw 28. The rear edge 31 of the cover between the legs 27 may be bent up- \vardly to form a flared opening to the glue chamber which is formed when the cover is in position. Bosses 32 may be struck up on the dauber as stops to be engaged. by the 27 as an additional means to hold the cover in its proper position on the dauber although as a general rule the screw 28 will amply suffice for this purpose. To permit a thin film of glue to flow from the chamber downwardly over the operative end of the dauber, two longitudinal ridges 33 are formed therein upon which the forward edge of the cover rests and is elevated slightly above the surface of the dauber.

The amount of flow through the opening thus formed may be regulated to suit various uses by varying the height of the said ridges.

Glue or other adhesive may be supplied to the dauber from any suitable source of supply by a pipe 35 and pet-cock 36 arranged thereabove so that the stream of gluefrom the pet-cock strikes the daubor midway between the saddles 20 and then flows down into the cover chamber. To catch the waste glue which drops from the device during use any suitable trough 38 may be placed thereunder and from this trough the waste glue may be pumped back to the supply through the pipe 39 to be used again.

In Figures 1, 2 and 3 my invention is shown as applied to a heel making machine ofthe type disclosed in my application hereinbefore referred to and for this purpose a portion of the rotary member for transfer-v ring heel lifts of the machine of said application is shown in various relations to the adhesive applying device. In those figures, 4-2 designates a part of the supporting frame of the machine and 43 the rotary transferring member which is in the form of a double skeleton wheel 43 mounted on a shaft 45 and provided with a plurality of pairs of radical gripping fingers 4:6 for holding heel lifts t? on flattened portions 48 of the peripheries of the wheels. The direction of rotation of the rotary member is indicated by the arrow.

The glue-applying device may be mounted in any suitable position to engage the heel lifts as they are being transferred by the rotary member 13 from the supplying means to the conveyor or assembling means but as shown the roclcshaft 17 is journalled in brackets 50 fastened. by screws 51 to the frame l2 and the support 15 and da-uber 10 are normally inclined downwardly toward the rotary member. To throw the device into operative position for applying glue to the heel. lifts as they are carried around, any suitable means may be provided and one such is shown comprising a tracker arm 52 fixed to the rock-shaft 17 and held in engagement with a circular cam-plate 53 fixed on the shaft 4-5 by a spring 5% attached atone end to an eyebolt 55 set in the tracker arm and at the other end to a fixed part of the frame of the machine. The circumference of the cam 53 is provided with a plurality of notches or recesses 57 corresponding in.

number to the number of heel seats on the transferring member and when the trackerarm engages a notch in the cam the glue device is thrown into engagement with a heel lift. 7

The operation of my device is extremely simple. In Figure 3, it is shown in a generally inoperative position, the dauber being retracted so that the rocking of the device through the tracker-arm and cam does not aifectany result since the dauber will not at any time engage a heel lift. In preparing the device for operation the dauber is mounted in the saddles on the support in a forward position as shown in Figure l and the pet-cock controlling the glue supply is opened. In Figure 5, the flow of the glue or other adhesive is illustrated. It will be noticed that the glue falls from the supply pipe in a stream upon the dauber and then flows downwardly filling up the chamber formed by the cover 25 and from thence beneath the forward edge '26 of the cover and the dauber down over the glue applying angle 14 and forward edge of the dauber, the flow from the cover being in a thin film of uniform depth over the entire forward portion of the dauber. In some cases, itmay be found desirable t0 provide the cover with sides to prevent glue flowing out of the cover chamber over the sides of the dauber but so far I have not found this to be neces sary since the chamber can be maintained sufficiently full of glue to insure an even flow over the forward portion'of the dauber and all glue falling from the device is caught in the trough 38 without any loss.

After the machine is started the operation of the device becomes automatic through the tracker arm and cam and is thereby thrown alternately into and out of operative posi tion. In Figure 1, the tracker arm shown I in engagement with a notch or recess 57 in the cam and in consequence the device is in operative position with the dauber in engagement with a heel lift. The length of this ei'igagement is determined by the length of the notch in the cam but preferably in a heel making machine, the glue is not applied to theentire length of the heel but only to a portion of the distance between. the breast and the back, and, therefore, the notches should be less than the length of the lifts. Between lifts the device held in an inoperative position as illustrated in Figure 2. I v

The glue applying device should be so positioned in relation to the rotary memher that the forward end of the dauber when in engagement with a heel lift will be pressed. down a slight distance thereby raising its rear end and the rod 22 in the recesses of the saddles as shown in Fig. 1. When this is done the dauber is then pivotally supported on the boss 23 alone and its movement thereon is controlled by the glue applying edge 14 which is in engagement with the heel lift. Under these circumstances the dauber might be said to be balanced on the boss in order to permit its glue applying ed e to follow the curved or oblique surface 0 the heel lift. This construction produces a dauber element which is flexible in movement to apply an adhesive evenly to curved or irregular surfaces. At the same time the pressure exerted upon the dauber by the heel lift as it is carried forward by the rotary member tends to remove all surplus glue therefrom and thereby obviates the necessity for any scraping means.

The ease with which the dauber element may be lifted up and retracted'from its position in Figure 1 to its position in Figure 3 is of great advantage especially in .a heel building machine which employs a plurality of the devices, one for each rotary transferring element, and in which changes of the dauber from one position to another are of frequent occurrence.

It is to be understood that myinvention is not to be limited to the exact form herein shown and described since it may be embodied in other constructions and it is not to be confined to use in a heel making machine because it is capable of use in other environments and I wish to claim it broadly except where specifically limited in the following claims. 7

hat I claim is 1. A device of the character described having, in combination, a support, a plate dauber for applying adhesive by engagement with the surface to be coated mounted on said support for a limited tilting or rocking movement in various directions to permit said dauber to follow oblique or curved surfaces of the article to be coated with ad hesive, means for providing a flow of adhesive to said dauber and means for roclo ing said support to move said dauber into and out of operative position.

2. A device of the character described having, in combination, a support, a plate dauber for applying adhesive by engagement with the surface to be coated. said dauber being loosely mounted on said support for tilting movement in various directions thereon, means for providing a continuous flow of glue or other adhesive over said dauber and means for rocking said support to move said dauber into and out of operative position.

3. A device of the character described having, in combination, a support, a plate dauber loosely mounted on, said support, means for supplying a continuous flow of adhesive to said dauber, means for regu lat-ing'the flow of said adhesive over said dauber and means for rocking said support to move said dauber into and out ofengagement with the surface to be coated.

4. A device of the character described having, in combination, a support, a plate dauber loosely mounted on said support for. tilting movement thereon, means for supplying a continuous flow of adhesive over said'dauber and means for rocking said support to move said dauber into'and out of edgewise engagement with the workto be coated.

5. A device of the character described having, in combination, a support, a plate dauber loosely mounted on said support for tilting movement in various directions thereon, means for supplying a continuous flow of adhesive to said dauber, means for evening the flow of said adhesive over the operative end of said dauber and means for rocking said support to move said dauber into and out of endwise engagement with the work to be coated.

6. A device of the character described having, in combination, a support, a plate dauber carried by said support and loosely mounted thereon, means for supplying a continuous flow of adhesive to said dauber, means on said dauber for spreading said adhesive in a thin film over its entire operative end and means for rocking said support to move the operative end of said dauber into and out of engagement with the work to be coated. l I 7. A device of the character described having, in combination, a support, a dauber inclined downwardly and loosely mounted on said support and having its lower end bent downwardly to form a glue-applying edge, means carried by said dauber for retaining a supply of glue for feeding the glue-applying edge and means for supplying glue to said retaining means. '8. A device of the character described having, in combination, a support mounted for a rocking movement, means for rocking said support, a dauber loosely mounted on said support in an inclined position, a retaining member fastened to said dauber for regulating the flow of glue over the operative portion of said dauber and means for: supplying glue to said device.

9. -;A device of the character described having, in combination, a support, a plate dauber loosely mounted on said support for applying adhesive, said dauber being retractable on said support from a forward position at the will of the operator and means for rocking said support to move said dauber when in a forward position into and out of operative position.

10. A device of the character described having, in combination, a support, a plate dauber loosely mounted thereon and capable of a limited tilting or rocking movement in various directions, said dauber. being retractable at the will of the operator, means for supplying glue to said dauber and means for rocking said support to move said dauber when in a forward position on said support into and out of operative position.

11. A device of the character described comprising a rock shaft, a support or carriage fixed on said shaft and adapted to be thrown into and out of operativeposition by the rocking movement of said shaft, a dauber element loosely mounted on said support and inclined downwardly, a cover element fixed on said dauber for forming aglue holding chamber between said cover and said dauber element, the lower edge of said cover element being cut away to permit a film of glue to flow over the operative edge of said dauber element.

12. A device of the character described comprising a support mounted for rocking movement and provided with a projecting boss on its forward end, a plate dauber loosely mounted on said supportand having its forward end balanced on said boss and means for rocking said support to throw said dauber into and out of operative position.

.13. A device of the character described comprising a support mounted for rocking movement and provided with side saddles and with a projecting boss on its forward end, a dauber loosely mounted on said side saddles and having its forward end balanced on said boss to permit said dauber to tilt to a limited extent in various directions and means for rocking said support to throw said dauber into and out of operative position.

14. A device of the character, described comprising a support mounted for a rocking movement and provided with recessed side saddles and a projecting boss centrally located on the upper face of its forward end,

a dauber loosely mounted in the recesses of said side saddles and having its forward end balanced on said boss, said dauber being adapted to be lifted from said saddles and retracted into an inoperative position when desired and means for rocking said support to throw said dauber into and out of onerative position when it is mounted on said saddles.

15. A device for applying adhesive to a moving body having, in com nation, a downwardly inclined. support having a boss on its upper face adjacent its lower end, a dauber loosely mounted on said support on said boss, means for supplying a continuous flow of adhesive o-verthe lower edge of said dauber and means for to throw said dauber into and out of engagement with said. moving body for applv ing adhesivethereto; said dauber being balanced on said boss when in engagement with said moving body in orderto follow any irregularities in the surface thereof.

16. The combination with rotary member provided with means for carrying a plurality of heel lifts of a support adjacent said rotary member, a plate dauber loosely mounted on said support for tilting in various directions, means for supplying a .continnous flow of adhesive over said dauber rocking said support and means carried by said rotary member for rocking said support to throw said dauber into and out of contact with said heel lifts on said rotary member.

17 The combination with a moving member provided with means for carrying objects to be coated with adhesive of a support mounted for a rocking movement and having a boss on its forward end, a dauber loosely mounted on said support and having its forward end balanced on said boss to permit said dauber to tilt thereon in various directions to follow curved or oblique surfaces on the said objects, means on said dauber for holding a surplus supply of adhesive and for permitting a uniform flow thereof over the operative end of said dauber and means operated by said moving member for rocking said support to throw said dauber into and out of operative position.

18. The combination with a rotary member provided with peripheral means for carrying a plurality of heel lifts of a support adjacent the periphery of said rotary member, a plate dauber loosely mounted on said support for tilting movement in various directions, means for supplying a continuous flow of adhesive over said dauber and means operated by said rotary member for rocking said support to throw said dauber into engagement with said heel lifts in succession to apply adhesive thereto.

19. The combination with a rotary member provided with peripheral means equally spaced apart for carrying a plurality of heel lifts, a downwardly inclined support mounted adjacent the periphery of said rotary member, adauber loosely mounted on said support for a limited tilting movement in various directions, means for supplying a continuous flow of adhesive over said dauber and means for rocking said support to throw said dauber into and out of engagement with said heel lifts for applying adhesive thereto when said rotary member is rotated.

In witness whereof, I hereunto set my hand this tenth day of September, 1925.

LESLIE A. HOLMAN. 

